Photomath Software Engineer III Interview Questions and Answers

Q1. What is the design of the microservices implemented in your current project?
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Q2. Can you provide a program that prints the second largest number in both an array and a list, illustrating implementations using streams as well as traditional methods?
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Q1. What is the process of implementing OAuth for authentication?
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Q2. What is the difference between functions and stored procedures?
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It was a simple Aptitude test designed to test your english proficiency and your quantitative skills.

Q1. Multiple questions meant to test your english communication proficiency
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There were 2 coding questions. The level of questions were not very high. The languages available for the round were Python, Java, C++, C, C#.

Q1. Please Introduce yourself
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Q2. What project did you work on in your final year?
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Q3. Do you have any connections in the industry?
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Q4. Did you undergo any Internships?
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Q1. Difference between out and ref.
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Q2. Sql query to find the 2nd last student marks
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Q3. Second round was around project specific like why mongodb or posgreSQL? Project architecture and followup questions.
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Q4. Create global exception handler.
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Q1. 1) OOPS in java, and told to explain abstraction, encapsulation, inheritance with practical code 2) Exception handling(globally), Authentication and authorization 3) SOLID principles and factory design pat...read more
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Interview questions for Software Engineer position covering OOPS concepts, exception handling, SOLID principles, Java 8 features, and Streams.
• Abstraction in OOPS: Hiding implementation details. Example: Abstract class Shape with method draw().

• Encapsulation in OOPS: Bundling data and methods that operate on the data. Example: Class Employee with private fields and public getters/setters.

• Inheritance in OOPS: Reusing code...read more
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Q2. 1) Advantage of springboot over spring 2) Tell me all the anotations you know in spring 3) What are CRUD operations, write controller layer and use validating annotations like @NotNull, @valid etc. how to ...read more
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The interview questions cover various topics related to Spring framework, REST vs SOAP, JPA repository, Feign client, circuit breaker, and Spring Security.
• Spring Boot provides a simpler and faster way to set up and run Spring applications compared to traditional Spring.

• Common annotations in Spring include @Controller, @Service, @Repository, @Autowired, @Component, @RequestMapping, @GetMapping, @PostMapping, @PutMapping...read more
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Q3. 1) ACID properties 2) DBMS commands 3) inner queries 4) Joins 5) S3 bucket congif and how to handle file and upload and retrieve in s3 6) Ci/Cd basic flow and docker explaination
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Q1. List down Java 8 features and use case
Ans. 
Java 8 introduced several new features including lambda expressions, streams, and functional interfaces.
• Lambda expressions: Allow for more concise and readable code by enabling functional programming.

• Streams: Provide a way to work with collections of objects in a more functional style.

• Functional interfaces: Interfaces with a single abstract method, used to enable lambda expressions.

• Optional class: Helps to avoid null p...read more
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Q2. List down Spring boot annotation used
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Spring boot annotations are used to simplify the development process by providing metadata to the Spring framework.
• 1. @SpringBootApplication - Main annotation to indicate the main class of a Spring Boot application.

• 2. @RestController - Annotation for RESTful web services.

• 3. @Autowired - Dependency injection annotation.

• 4. @GetMapping, @PostMapping, @PutMapping, @DeleteMapping - Annotations for mapping HTTP requests to c...read more
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Q3. Difference between String builder and String Buffer
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String Builder is not synchronized and faster, while String Buffer is synchronized and slower.
• String Builder is not thread-safe, while String Buffer is thread-safe.

• String Builder is faster due to lack of synchronization, while String Buffer is slower due to synchronization.

• String Builder is recommended for single-threaded operations, while String Buffer is recommended for multi-threaded operations.
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Q4. What is String pool
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String pool is a storage area in memory where strings are stored to optimize memory usage by reusing common strings.
• String pool helps in reducing memory usage by storing only one copy of each unique string.

• Strings created using double quotes are stored in the string pool.

• Strings created using new keyword are not stored in the string pool.
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Q5. Number of memory type have. like heap memory , stack
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There are two main types of memory in a computer system: stack memory and heap memory.
• Stack memory is used for static memory allocation and is managed by the compiler. It is typically faster but limited in size.

• Heap memory is used for dynamic memory allocation and is managed by the programmer. It is slower but has a larger size.

• Examples: C programming language uses stack memory for function calls and heap memory for dy
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Q1. What are the steps to add a number at the end of a linked list?
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Q2. Arrange the array in ansecending order
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Q1. Can you tell me about yourself?
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I am a passionate software engineer with a strong background in computer science and experience in developing innovative solutions.
• Completed a Bachelor's degree in Computer Science from XYZ University

• Proficient in programming languages such as Java, Python, and C++

• Worked on projects involving web development, database management, and machine learning

• Strong problem-solving skills and ability to work in a team environmen
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Q2. What was your role and contributions in your projects?
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I was responsible for designing and implementing new features, fixing bugs, and optimizing performance in various projects.
• Designed and implemented new features based on client requirements

• Fixed bugs reported by QA team or end users

• Optimized performance by refactoring code or improving algorithms

• Collaborated with team members to ensure project deadlines were met
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Q3. Are you willing to relocate?
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Yes, I am open to relocating for the right opportunity.
• I am open to relocating for the right job opportunity

• I am flexible and willing to move for the right position

• I have relocated for previous jobs and am comfortable with the process
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Q1. What is the SQL query to find the second highest rank in a dataset?
Ans. 
Use a subquery to find the second highest rank in a dataset.
• Use a subquery to select the maximum rank from the dataset.

• Then use another subquery to select the maximum rank that is less than the maximum rank found in the first subquery.
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Q2. What is a program to determine whether a number is odd or even?
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A simple program using modulo operator to determine if a number is odd or even.
• Use the modulo operator (%) to check if the number divided by 2 leaves a remainder

• If the remainder is 0, the number is even. If the remainder is 1, the number is odd

• Example: num % 2 == 0 (even), num % 2 == 1 (odd)
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